There's a company, I think it's Mythic Beasts in the UK, that has or had a job application that had something along the lines of (before you got to the form) 'first prove you're not a robot do this simple maths blah...' but every time you submitted your answer, by typing in and clicking on the page, you got an error page saying 'too slow'. I wasn't looking for a job at the time but that has to easily be my favourite application process ever!